Doesn't matter what make it is the answers the same.
Get car in air and undo the clamps, if it's all a bit crusty you may have to get
the FBH out and give it but of a clump to free it all up. A bit of judicious twisting different sections will raise it quite considerably so it won't catch
any except the worst (see peoples republic of Islington) humps.
Pay particular attention to the section to the rear of back box as, if memory
serves, this makes the biggest difference. If you want to do the the job really well (see broken studs etc above) Collins (Mongoose)produce a bolt on bracket which bolts to the floor near gear linkage/those of you fitting your
shiney new B+M's today will no doubt have seen the two hole which this bolts to. Hope this Helps.
P.S.
surely the collective noun for mongose is mongeese/just a thought!